5/7 Drop - The 1947 - Present Chevrolet & GMC Truck Message Board Network

T_Dilley · 03-17-2006, 03:43 PM

Is it posssible to achieve a 5/7 drop with rear shackle/lowering leaf pack & Drop spindle and coil. I was looking at the rear of my truck and thought there might possibly be some interference with the frame/body.

86 GMG · 03-17-2006, 03:46 PM

you have to do what they call a c notch this allows the rear axle to go up in to the frame area im sure someone else will chim in and explain in more detail

piecesparts · 03-17-2006, 08:08 PM

In most cases the radical drop of 7 inches will require the axle to be on top of the spring packs. This will require the adapters that whichever company you choose to go with, sells for the axle to set on the springs. The "C Notch" will also be required in the rear frame for the axle to fit up into and in a lot of cases a notch cut into the baed frame runner for the rear pumpkin to clear. This takes some time to do and then a careful approach to geting the rear axle aligned with the U-joints on the rear of the tranny. If your truck has a carrier bearing assmbly in the driveline, then there is some changes needed there also. Taking the bed off of the frame is a must for this work.

As for the front, the drop spindle and the front coils will be the easier part of this, but keep in mind that you will have to most undoubtedly change your front wheel offset to ensure that the lower A-Frames clear the rim. The ride will be rougher than what you know now and that is OK for some.

Spend some time on the phone with Bell-Tech, DJM, and any other company that makes lowering kits for knowledge and what is involved. A lot of companies offer their installation instructions on the web, so you can see what is involved. Especially Bell Tech--Try them.

ItsNotABlazer · 03-17-2006, 09:54 PM

You might get a bit more info also if you post it over in the suspension section. Already a lot of informative posts out there on the subject. I am going to definitely get a notch done in both my 96 Yukon and the 75 Jimmy. Both are basically sitting right on the bumpstops now lol. Izzy is a good person to talk to on drops. He did my bag setup on my 95 and had a 83 that was 5/8 dropped. Might look him up here or on fullsizechevy.com

Brad

**AspecialZ** · 03-18-2006, 12:12 AM

notch pic...I've always been the picture type..

**Captkaos** · 03-18-2006, 12:26 PM

Anything over 4" drop in the rear will require a notch of the frame.

03-17-2006, 03:43 PM	#1
T_Dilley Can't tell me nothin' Join Date: Nov 2004 Location: Pana, IL Posts: 250	5/7 Drop Is it posssible to achieve a 5/7 drop with rear shackle/lowering leaf pack & Drop spindle and coil. I was looking at the rear of my truck and thought there might possibly be some interference with the frame/body.

03-17-2006, 03:46 PM	#2
86 GMG Registered User Join Date: Apr 2005 Location: Tulsa Oklahoma Posts: 943	Re: 5/7 Drop you have to do what they call a c notch this allows the rear axle to go up in to the frame area im sure someone else will chim in and explain in more detail __________________ square body trucks an addiction or an investment either way they consume all my extra time and money

03-17-2006, 08:08 PM	#3
piecesparts Parts and more parts Join Date: Nov 2003 Location: Lebo, Kansas (middle of nowhere Posts: 6,821	Re: 5/7 Drop In most cases the radical drop of 7 inches will require the axle to be on top of the spring packs. This will require the adapters that whichever company you choose to go with, sells for the axle to set on the springs. The "C Notch" will also be required in the rear frame for the axle to fit up into and in a lot of cases a notch cut into the baed frame runner for the rear pumpkin to clear. This takes some time to do and then a careful approach to geting the rear axle aligned with the U-joints on the rear of the tranny. If your truck has a carrier bearing assmbly in the driveline, then there is some changes needed there also. Taking the bed off of the frame is a must for this work. As for the front, the drop spindle and the front coils will be the easier part of this, but keep in mind that you will have to most undoubtedly change your front wheel offset to ensure that the lower A-Frames clear the rim. The ride will be rougher than what you know now and that is OK for some. Spend some time on the phone with Bell-Tech, DJM, and any other company that makes lowering kits for knowledge and what is involved. A lot of companies offer their installation instructions on the web, so you can see what is involved. Especially Bell Tech--Try them.

03-17-2006, 09:54 PM	#4
ItsNotABlazer The full convertible guy Join Date: Jul 2001 Location: Paris Texas Posts: 728	Re: 5/7 Drop You might get a bit more info also if you post it over in the suspension section. Already a lot of informative posts out there on the subject. I am going to definitely get a notch done in both my 96 Yukon and the 75 Jimmy. Both are basically sitting right on the bumpstops now lol. Izzy is a good person to talk to on drops. He did my bag setup on my 95 and had a 83 that was 5/8 dropped. Might look him up here or on fullsizechevy.com Brad __________________ 2012 Kawasaki Vaquero (Lime Green) 2000 BMW 740iL 1995 Chevy ECSB riding on air 1975 GMC Jimmy 2WD lowered 4/6 1972 Chevy Trazer soon to be roadster 1965 Mustang 289/3 speed (friends dad bought it new) 1964 Chevy C10 (dad bought it new)

03-18-2006, 12:12 AM	#5
AspecialZ Street Rod Restoration Join Date: Jan 2004 Location: Wellsburg, WV Posts: 882	Re: 5/7 Drop notch pic...I've always been the picture type.. Attached Images __________________ Follow me on Instagram @ hot_rod_shop

03-18-2006, 12:26 PM	#6
Captkaos www.73-87chevytrucks.com Join Date: Dec 1999 Location: Birmingham, AL Posts: 6,935	Re: 5/7 Drop Anything over 4" drop in the rear will require a notch of the frame. __________________ Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.